title: Research on a novel composite structure Er³⁺-doped DBR fiber laser with a π-phase shifted FBG.
abstract: A simple composite cavity structure Er³⁺-doped fiber laser was proposed and demonstrated experimentally. The resonant cavity consists of a pair of uniform fiber Bragg gratings (FBGs) and a π-phase shifted FBG. By introducing the π-phase shifted FBG into the cavity as the selective wavelength component, it can increase the effective length of the laser cavity and suppress the multi-longitudinal modes simultaneously. The narrow linewidth of 900 Hz and low RIN of -95 dB/Hz were obtained. And the lasing wavelength was rather stable with the pump power changing. The SMRS was more than 67 dB. The results show that the proposed fiber laser has a good performance and considerable potential application for fiber sensor and optical communication.
authors.forename: Yanjie
authors.initials: Y
authors.lastname: Zhao
authors.forename: Jun
authors.initials: J
authors.lastname: Chang
authors.forename: Qingpu
authors.initials: Q
authors.lastname: Wang
authors.forename: Jiasheng
authors.initials: J
authors.lastname: Ni
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Song
authors.forename: Haifeng
authors.initials: H
authors.lastname: Qi
authors.forename: Chang
authors.initials: C
authors.lastname: Wang
authors.forename: Pengpeng
authors.initials: P
authors.lastname: Wang
authors.forename: Liang
authors.initials: L
authors.lastname: Gao
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Sun
authors.forename: Guangping
authors.initials: G
authors.lastname: Lv
authors.forename: Tongyu
authors.initials: T
authors.lastname: Liu
authors.forename: Gangding
authors.initials: G
authors.lastname: Peng